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/* Copyright (c) 1996 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* image.c - routines for image generation. |
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* |
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* External symbols declared in view.h |
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*/ |
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|
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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|
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#include "standard.h" |
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#include "view.h" |
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#include "resolu.h" |
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#include "paths.h" |
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#define FEQ(x,y) (fabs((x)-(y)) <= FTINY) |
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static char ill_horiz[] = "illegal horizontal view size"; |
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static char ill_vert[] = "illegal vertical view size"; |
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|
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if (v->vfore < -FTINY || v->vaft < -FTINY || |
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(v->vaft > FTINY && v->vaft <= v->vfore)) |
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if (v->vaft < -FTINY || (v->vaft > FTINY && v->vaft <= v->vfore)) |
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return("illegal fore/aft clipping plane"); |
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if (normalize(v->vdir) == 0.0) /* normalize direction */ |
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} |
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void |
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normaspect(va, ap, xp, yp) /* fix pixel aspect or resolution */ |
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double va; /* view aspect ratio */ |
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double *ap; /* pixel aspect in (or out if 0) */ |
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} |
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void |
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viewloc(ip, v, p) /* find image location for point */ |
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FVECT ip; |
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register VIEW *v; |
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FVECT p; |
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{ |
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double d; |
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double d, d2; |
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FVECT disp; |
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disp[0] = p[0] - v->vp[0]; |
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break; |
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case VT_PER: /* perspective view */ |
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d = DOT(disp,v->vdir); |
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ip[2] = sqrt(DOT(disp,disp)); |
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ip[2] = VLEN(disp); |
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if (d < 0.0) { /* fold pyramid */ |
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ip[2] = -ip[2]; |
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d = -d; |
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ip[2] -= v->vfore; |
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break; |
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case VT_CYL: /* cylindrical panorama */ |
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ip[2] = DOT(disp,v->vdir); |
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d = DOT(disp,v->hvec); |
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ip[0] = 180.0/PI * atan2(d,ip[2]) / v->horiz + 0.5 - v->hoff; |
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ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
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if (v->vfore > FTINY) |
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ip[2] = sqrt(DOT(disp,disp)) * |
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(1.0 - v->vfore/sqrt(d*d + ip[2]*ip[2])); |
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else |
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ip[2] = sqrt(DOT(disp,disp)); |
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d2 = DOT(disp,v->vdir); |
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ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
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d = 1.0/sqrt(d*d + d2*d2); |
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ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
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ip[2] = VLEN(disp); |
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ip[2] *= (1.0 - v->vfore*d); |
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return; |
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case VT_ANG: /* angular fisheye */ |
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ip[0] = 0.5 - v->hoff; |
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} |
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void |
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pix2loc(loc, rp, px, py) /* compute image location from pixel pos. */ |
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FLOAT loc[2]; |
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register RESOLU *rp; |
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{ |
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register int x, y; |
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if (rp->or & YMAJOR) { |
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if (rp->rt & YMAJOR) { |
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x = px; |
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y = py; |
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} else { |
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x = py; |
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y = px; |
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} |
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if (rp->or & XDECR) |
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if (rp->rt & XDECR) |
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x = rp->xr-1 - x; |
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if (rp->or & YDECR) |
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if (rp->rt & YDECR) |
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y = rp->yr-1 - y; |
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loc[0] = (x+.5)/rp->xr; |
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loc[1] = (y+.5)/rp->yr; |
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} |
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void |
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loc2pix(pp, rp, lx, ly) /* compute pixel pos. from image location */ |
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int pp[2]; |
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register RESOLU *rp; |
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x = lx * rp->xr; |
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y = ly * rp->yr; |
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if (rp->or & XDECR) |
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if (rp->rt & XDECR) |
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x = rp->xr-1 - x; |
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if (rp->or & YDECR) |
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if (rp->rt & YDECR) |
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y = rp->yr-1 - y; |
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if (rp->or & YMAJOR) { |
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if (rp->rt & YMAJOR) { |
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pp[0] = x; |
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pp[1] = y; |
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} else { |
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int nvopts = 0; |
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if (*s != '-') |
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s = sskip(s); |
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s = sskip2(s,1); |
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while (*s) { |
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ac = 0; |
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do { |
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} |
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void |
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fprintview(vp, fp) /* write out view parameters */ |
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register VIEW *vp; |
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FILE *fp; |
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}; |
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static |
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static int |
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gethview(s, v) /* get view from header */ |
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char *s; |
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register struct myview *v; |
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{ |
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if (isview(s) && sscanview(v->hv, s) > 0) |
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v->ok++; |
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return(0); |
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} |
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struct myview mvs; |
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FILE *fp; |
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if ((fp = fopen(fname, "r")) == NULL) |
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if (fname == NULL || !strcmp(fname, "-")) |
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fp = stdin; |
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else if ((fp = fopen(fname, "r")) == NULL) |
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return(-1); |
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mvs.hv = vp; |
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mvs.ok = 0; |
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getheader(fp, gethview, &mvs); |
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getheader(fp, (int (*)(char *, char *))&gethview, (char *)&mvs); |
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if (rp != NULL && !fgetsresolu(rp, fp)) |
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mvs.ok = 0; |